Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[cascardo/linux.git] / fs / xfs / xfs_dfrag.c

diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c
index f852b08..c407e1c 100644 (file)
--- a/fs/xfs/xfs_dfrag.c
+++ b/fs/xfs/xfs_dfrag.c
@@ -219,6 +219,14 @@ xfs_swap_extents(
        int             taforkblks = 0;
        __uint64_t      tmp;
 
+       /*
+        * We have no way of updating owner information in the BMBT blocks for
+        * each inode on CRC enabled filesystems, so to avoid corrupting the
+        * this metadata we simply don't allow extent swaps to occur.
+        */
+       if (xfs_sb_version_hascrc(&mp->m_sb))
+               return XFS_ERROR(EINVAL);
+
        tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
        if (!tempifp) {
                error = XFS_ERROR(ENOMEM);